[Validator] fix #43345 @Assert\DivisibleBy

Author: CharlyPoppins

Constraints/DivisibleByValidator.php

@@ -42,6 +42,12 @@ protected function compareValues($value1, $value2)
         if (!$remainder = fmod($value1, $value2)) {
             return true;
         }
+        if (\is_float($value2) && \INF !== $value2) {
+            $quotient = $value1 / $value2;
+            $rounded = round($quotient);
+
+            return sprintf('%.12e', $quotient) === sprintf('%.12e', $rounded);
+        }
 
         return sprintf('%.12e', $value2) === sprintf('%.12e', $remainder);
     }

Tests/Constraints/DivisibleByValidatorTest.php

@@ -46,6 +46,18 @@ public function provideValidComparisons(): array
             [0, 3.1415],
             [42, 42],
             [42, 21],
+            [10.12, 0.01],
+            [10.12, 0.001],
+            [1.133, 0.001],
+            [1.1331, 0.0001],
+            [1.13331, 0.00001],
+            [1.13331, 0.000001],
+            [1, 0.1],
+            [1, 0.01],
+            [1, 0.001],
+            [1, 0.0001],
+            [1, 0.00001],
+            [1, 0.000001],
             [3.25, 0.25],
             ['100', '10'],
             [4.1, 0.1],
@@ -74,6 +86,7 @@ public function provideInvalidComparisons(): array
             [10, '10', 0, '0', 'int'],
             [42, '42', \INF, 'INF', 'float'],
             [4.15, '4.15', 0.1, '0.1', 'float'],
+            [10.123, '10.123', 0.01, '0.01', 'float'],
             ['22', '"22"', '10', '"10"', 'string'],
         ];
     }